First Photo from Set of The Flash / Supergirl Crossover

Ahead of The Flash's appearance in Supergirl, Grant Gustin ("Barry Allen/The Flash") has shared a photo alongside Melissa Benoist ("Kara Danvers/Supergirl") from the set of the upcoming crossover.

Gustin posted the photo on Instagram, along with the caption: "Those two emblems look pretty good together."

Gustin also humorously tweeted about the difference between filming The Flash in Vancouver (where the temperature is currently in the 40s and 50s fahrenheit) vs. Supergirl's Los Angeles-based production, where it's been in the 80s this week.

After teasing the possibility of a crossover back in January, CBS just recently confirmed Barry Allen will indeed be speeding his way into an episode of Supergirl next month. The network has yet to detail the storyline, but the crossover will serve as the first time Melissa Benoist's Kara Zor-El directly connects with The CW's superhero TV universe - following a tease on this week's The Flash.

The Flash / Supergirl crossover episode will air on Monday, March 28. In the meantime, check out IGN's review of Supergirl's latest episode.

Alex Osborn is a freelance writer for IGN. You can follow him on Twitter and subscribe to him on YouTube.